Objective To investigate the therapy of malocclusion which accompanied with congenital missing lower incisors.

目的：探討伴有下切牙先天缺失的錯牙合畸形的臨床治療方法欧美性爱一级shipin。

The 3-D FE model of the maxilla and upper incisors of this study had proved to be precise and effective, and could be applied in the stress-strain analysis of the maxilla and teeth.

本研究建立的上頜骨和上切牙的三維有限元模型較為理想CaoPoron草棚在线视频，可以作相應的頜骨人人操两性视、牙齒的生物力學分析亚a视频在线；其建模技術較為獨特而精準可行国内精品视频在线观看6。

Based on this background, maxillary central incisors was prepared as residual roots model, the materials which has the similar physical properties and capabilities as that of the alveolar bone and periodontal membrane respectively were chosen.

基于上述情況，本實驗以人離體上中切牙制備實驗模型国产亚洲成年网址在线观看，以力學性能近似的材料模擬牙槽骨欧美黄色视频视频、牙周膜和樁冠修復后的上前牙亚欧免费无码Aⅴ在线观看天美，制作與上前牙口內(nèi)受力角度相同的夾具及壓力頭，形成加載測試系統(tǒng)求黄色网站网址。

Therefore, in a newly designed three-dimensional cell culture system that fulfils the conditions necessary for odontoblast differentiation (Kikuchi et al. 2002), we examined whether dental papilla cells in rat mandibular incisors could differentiate into tubular dentine-forming cells.

本實驗我們設計了另一種新的三維培養(yǎng)模型東熱东京亚洲黄色网站X久国产，來研究成牙本質(zhì)細胞的分化，并觀察大鼠下切牙牙乳頭細胞能否形成管狀牙本質(zhì)免费全部A毛片。

Attentive mother to know her secret: the new two big front teeth grow super-large, such as general as the iron door, a big laugh grin incisors on the occupied people's attention, the new understanding of the students make fun of her, no one can no longer said she, like "Princess" has been.

細心的媽媽知道她的秘密：換牙后新長出的兩顆大門牙超級大26uuu欧美亚洲日韩另类，像把門的鐵將軍一樣，一咧嘴笑大門牙就占據(jù)了人們的視線欧洲和曰韩小姐一级A片，新認識的同學取笑她www.91av在线，再也沒人說她像"公主"了。

The most common torque need for the upper incisors during orthodontic treatment is increased palatal root torque.

最常見的扭矩需要切牙正畸治療中增加腭根扭矩97黄色视频在线。

Why was palatal root torque increased for the upper incisors in the MBT system?

為什么腭根扭矩增加為切牙的主戰(zhàn)坦克系統(tǒng)精品人妻系列无码麻豆？

The three groups were loaded and analyzed under the same loading according to the mean value of the bite force of incisors. RESULTS:(1)The maximum stress of dentin in group A was twice higher than that in group B. The maximum primary stress, minimum primary stress and maximum shear stress of group A were respectively 236.35, 228.83 and 218.05 percent of those in group B. The difference of maximum stress values of group B and group C was neglectable.(2) The maximum stress distribution of dentin in group A and group B was quite different (the stress was concentrated in labial and lingual side of the cervical dentin in group A, otherwise in group B it was concentrated in the area around the alveolar and the labial and lingual side of the dentin which was opposite to the tip of the cast metal post and core). The maximum stress distribution of dentin in group A and group B was almost the same.

結果：(1)從牙本質(zhì)的應力大小來看，A組中牙本質(zhì)最大應力值比B組中牙本質(zhì)最大應力值增大了1倍以上（最大主應力在线能看的毛片、最小主應力和最大剪切應力A組分別是B組的236.35%国产乱子仑片视频免费观看、228.83%和218.05%），而B組與C組的牙本質(zhì)最大應力值相差極泄患渡淮笃成年人在线免费网站；(2)從牙本質(zhì)的應力分布位置來看，A組與B組的牙本質(zhì)最大應力分布位置相差甚遠（A組主要集中在牙頸部唇舌側(cè)肩臺部的牙本質(zhì)上色色视频精品一二区，B組主要集中于牙槽嵴頂附近及鑄造樁核尾端相對應的唇舌側(cè)的牙本質(zhì)上）又色又污的免费视频网站，而B組與C組的牙本質(zhì)最大應力分布幾乎在同一位置。

Objective To investigate the clinical effect of one-time root canal therapy and reattachment of permanent incisors with crown fracture.

目的：觀察恒切牙外傷冠折后行一次性根管治療與斷冠再接術的臨床效果国产A级特黄的片子频免费。

Objective:To investigate the effects of extraction to the morphology of symphysis and the relationship between lower incisors retraction and the changes of the symphysis by evaluating the cephalograms of patients with Angle Class II Division 1 malocclusion.,in order to provide a reference to clinical treatment.

目的： 通過對安氏Ⅱ~1類錯拔牙矯治前后的X線頭影測量分析欧美簧片，觀察矯治前后頦部形態(tài)的變化，并探討下切牙內(nèi)收量與頦部厚度和傾斜度變化之間的相關關系久久99精品国产99，以期為臨床矯治設計提供一定的參考日韩成人国语在线视频观看网站大全。